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From:   John Hubbard <jhubbard@nvidia.com>
To:     Andrew Morton <akpm@linux-foundation.org>
CC:     Shuah Khan <shuah@kernel.org>,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        Ralph Campbell <rcampbell@nvidia.com>,
        =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= <jglisse@redhat.com>,
        Jonathan Corbet <corbet@lwn.net>,
        LKML <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
        <linux-kselftest@vger.kernel.org>,
        John Hubbard <jhubbard@nvidia.com>
Subject: [PATCH v3 9/9] selftests/vm: 2x speedup for run_vmtests.sh
Date:   Sun, 25 Oct 2020 23:40:21 -0700
Message-ID: <20201026064021.3545418-10-jhubbard@nvidia.com>
In-Reply-To: <20201026064021.3545418-1-jhubbard@nvidia.com>
References: <20201026064021.3545418-1-jhubbard@nvidia.com>
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Each invocation of userfaultfd for "anon" and "shmem" was taking about
6.5 sec to run, contributing to an overall run time of about 22 sec for
run_vmtests.sh.

Reduce the size and bounce input values to the userfaultfd invocation
within run_vmtests.sh, enough to get each invocation down to about 1.0
sec. This should still provide a reasonable smoke test, while staying
within a nominal time budget of around 1 second or so per test. And this
brings the overall running time of run_vmtests.sh down to 11 second.

Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 tools/testing/selftests/vm/run_vmtests.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/vm/run_vmtests.sh b/tools/testing/self=
tests/vm/run_vmtests.sh
index 4ac84b350d9f..9e8837768ee2 100755
--- a/tools/testing/selftests/vm/run_vmtests.sh
+++ b/tools/testing/selftests/vm/run_vmtests.sh
@@ -160,7 +160,7 @@ fi
 echo "-------------------"
 echo "running userfaultfd"
 echo "-------------------"
-./userfaultfd anon 128 32
+./userfaultfd anon 20 16
 if [ $? -ne 0 ]; then
 	echo "[FAIL]"
 	exitcode=3D1
@@ -185,7 +185,7 @@ rm -f $mnt/ufd_test_file
 echo "-------------------------"
 echo "running userfaultfd_shmem"
 echo "-------------------------"
-./userfaultfd shmem 128 32
+./userfaultfd shmem 20 16
 if [ $? -ne 0 ]; then
 	echo "[FAIL]"
 	exitcode=3D1
--=20
2.29.0